纳米水化硅酸钙的制备及对水泥水化影响的研究进展

摘要/Abstract

摘要： 随着纳米技术的不断发展,纳米材料逐步开始应用于传统混凝土材料中,以提高混凝土的各项服役性能。纳米水化硅酸钙(纳米C-S-H)是一种新型的早强纳米复合材料,可通过晶核效应加快水泥早期水化速率,显著提高水泥基材料的早期力学性能,从而提高施工效率,满足特殊施工要求。本文系统总结了纳米C-S-H的制备方法,及纳米C-S-H对水泥基材料早期和长期性能的影响规律,探讨了其对于水泥水化过程和水化产物的影响机制,其中重点介绍了采用聚合物分散纳米颗粒制备的C-S-H/PCE(聚羧酸型减水剂,简称PCE)纳米复合材料。

关键词: 纳米水化硅酸钙, C-S-H/PCE纳米复合材料, 水泥水化, 力学性能, 早期强度, 后期强度

Abstract: With the continuous development of nanotechnology, nanomaterials are gradually used in traditional concrete materials to improve the various performance of concrete. Nano calcium silicate hydrate (nano C-S-H) is a new type of early strength nanocomposites, it can accelerate the early hydration rate of cement through the seeding effect, and significantly improve the early mechanical properties of cement-based materials, so as to improve the construction efficiency and meet the special construction requirements. In this paper, the preparation methods of nano C-S-H and the influence of nano C-S-H on the early and long-term properties of cement-sbased materials are systematically summarized, the influence mechanism of nano C-S-H on the hydration process and hydration products of cement is discussed, especially the C-S-H/PCE (polycarboxylic acid type water reducer, called PCE) nanocomposites prepared by polymer dispersed nanoparticles are introduced.

Key words: nano calcium silicate hydrate, C-S-H/PCE nanocomposite, cement hydration, mechanical performance, early strength, long-term strength

中图分类号:

TQ172.1

陈娇, 于诚, 慕儒, 余鑫. 纳米水化硅酸钙的制备及对水泥水化影响的研究进展[J]. 硅酸盐通报, 2021, 40(5): 1429-1140.

CHEN Jiao, YU Cheng, MU Ru, YU Xin. Research Progress on Preparation of Nano Calcium Silicate Hydrate and Its Influence on Cement Hydration[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(5): 1429-1140.

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